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Introduction
Print Hello WorldAdd Two NumbersFind the Square RootCalculate the Area of a TriangleSwap Two VariablesConvert Kilometers to MilesConvert Celsius to FahrenheitWork With ConstantsWrite to ConsoleControl Flow
Solve Quadratic EquationCheck if a number is Positive, Negative, or ZeroCheck if a Number is Odd or EvenFind the Largest Among Three NumbersCheck Prime NumberPrint All Prime Numbers in an IntervalFind the Factorial of a NumberDisplay the Multiplication TablePrint the Fibonacci SequenceCheck Armstrong NumberFind Armstrong Number in an IntervalMake a Simple CalculatorFind the Sum of Natural NumbersCheck if the Numbers Have Same Last DigitFind HCF or GCDFind LCMFind the Factors of a NumberDisplay Fibonacci Sequence Using RecursionFunctions
Generate a Random NumberFind Sum of Natural Numbers Using RecursionGuess a Random NumberFind Factorial of Number Using RecursionConvert Decimal to BinaryFind ASCII Value of CharacterSet a Default Parameter Value For a FunctionCheck If a Variable is of Function TypePass Parameter to a setTimeout() FunctionPerform Function OverloadingPass a Function as ParameterArrays and Objects
Shuffle Deck of CardsCreate Objects in Different WaysRemove a Property from an ObjectCheck if a Key Exists in an ObjectClone a JS ObjectLoop Through an ObjectMerge Property of Two ObjectsCount the Number of Keys/Properties in an ObjectAdd Key/Value Pair to an ObjectConvert Objects to StringsReplace all Instances of a Character in a StringRemove Specific Item From an ArrayCheck if An Array Contains a Specified ValueInsert Item in an ArrayAppend an Object to an ArrayCheck if An Object is An ArrayEmpty an ArrayAdd Element to Start of an ArrayRemove Duplicates From ArrayMerge Two Arrays and Remove Duplicate ItemsSort Array of Objects by Property ValuesCreate Two Dimensional ArrayExtract Given Property Values from Objects as ArrayCompare Elements of Two ArraysGet Random Item From an ArrayPerform Intersection Between Two ArraysSplit Array into Smaller ChunksCheck If A Variable Is undefined or nullIllustrate Different Set OperationsStrings
Check Whether a String is Palindrome or NotSort Words in Alphabetical OrderReplace Characters of a StringReverse a StringCheck the Number of Occurrences of a Character in the StringConvert the First Letter of a String into UpperCaseCount the Number of Vowels in a StringCheck Whether a String Starts and Ends With Certain CharactersReplace All Occurrences of a StringCreate Multiline StringsFormat Numbers as Currency StringsGenerate Random StringCheck if a String Starts With Another StringTrim a StringCheck Whether a String Contains a SubstringCompare Two StringsEncode a String to Base64Replace All Line Breaks withGet File ExtensionGenerate a Range of Numbers and CharactersRemove All Whitespaces From a TextMiscellaneous
Display Date and TimeCheck Leap YearFormat the DateDisplay Current DateCompare The Value of Two DatesCreate Countdown TimerInclude a JS file in Another JS fileGenerate a Random Number Between Two NumbersGet The Current URLValidate An Email AddressImplement a StackImplement a QueueCheck if a Number is Float or IntegerGet the Dimensions of an ImageConvert Date to NumberJavaScript Program to Format the Date
To understand this example, you should have the knowledge of the following JavaScript programming topics:
Example 1: Format The Date
// program to format the date
// get current date
let currentDate = new Date();
// get the day from the date
let day = currentDate.getDate();
// get the month from the date
// + 1 because month starts from 0
let month = currentDate.getMonth() + 1;
// get the year from the date
let year = currentDate.getFullYear();
// if day is less than 10, add 0 to make consistent format
if (day < 10) {
day = '0' + day;
}
// if month is less than 10, add 0
if (month < 10) {
month = '0' + month;
}
// display in various formats
const formattedDate1 = month + '/' + day + '/' + year;
console.log(formattedDate1);
const formattedDate2 = month + '-' + day + '-' + year;
console.log(formattedDate2);
const formattedDate3 = day + '-' + month + '-' + year;
console.log(formattedDate3);
const formattedDate4 = day + '/' + month + '/' + year;
console.log(formattedDate4);
Output
08/26/2020
08-26-2020
26-08-2020
26/08/2020
In the above example,
- The
new Date()
object gives the current date and time.
let currentDate = new Date();
console.log(currentDate);
// Output
// Wed Aug 26 2020 10:45:25 GMT+0545 (+0545)
- The
getDate()
method returns the day from the specified date.
let day = currentDate.getDate();
console.log(day); // 26
- The
getMonth()
method returns the month from the specified date.
let month = currentDate.getMonth() + 1;
console.log(month); // 8
-
1 is added to the
getMonth()
method because month starts from 0. Hence, January is 0, February is 1, and so on. -
The
getFullYear()
returns the year from the specified date.
let year = currentDate.getFullYear();
console.log(year); // 2020
Then you can display the date in different formats.
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